Cabinet amplifier



l 1,623,065 Apnl 5 1927' H. B. NEWHALL ET AL CABINET AMPLIFI Filed Julysa, 1924 Patented Apr. s', 1927.

uNlTED STATE-s NIWHALL, OPLAINI'IELD, AND HENRY W. PLEISTEB, OF WESTFIEJD,

vHEN'ABY B.

PATENT ol- FICE.

im; SAID PLEISTER ASSIGNOB. T SAID NEWHALL. l

calamar Marianna.

Applic'ation' led July 9, 1.924. Serial No. 725,072.

One of the objects of our present invention l is to utilize in a cabinet oi the character described a sound am lir having great economy of space an `li htness in weight and -of great eiliciency, an construction is capable tuting in the present instance a door or closure member. yAmplifiers suitable for this purpose are described'and shown in 'pending United States application SerialNo. 668,840 filed Oct. 16, 1923 in the name of Harold D. Penney, and United States application Serial l No. 695,974, filed Feb. 29, 1924 for improvements in sound amplifiers in the name of Henry W. Pleister, both of which' applications andthe inventions thereinY described and claimed have been duly assigned to the above named Henry B." Newhall.

,If reference is had to the two above noted pending patent applications, it will be noted that one ofthe peculiar features of the structure of this sound amplifier as disclosed relates to its lack of depth, structurally speaking, and due to this feature, it is permissible where Aused with a cabinet such as herein described and as shown in the drawings, to utilize the same as a door structure without encroaching to any material extent upon the s ace withln the cabinet, thereby permittin t e elective and economical combination o a sound amplifying device with a cabinet enclosing a radio receiver of the customary type having the usual audio amplifying means and aloud s aking telephone within the cabinet and wit out interfering one with the other and at the same time while producing amplified rsound of suitable volume and quality, ro'viding a portable amplifying cabinet o this class wlthout materially increasing the wei ht thereof and without interfering with t e pro r function of any ,of the coacting arts an without the necessity fora cum rsome and runsightly amplliier or horn separable from the cabinet.

which due to its of forming part of A the exterior wall of the cabinet and consti- Anotherfadvantage of our device is that speakingtelephone,

owing to its narrow and shallow construction it may be readily adapted as a door in any desired position in a radio or othercabinetwithout necessitating any change in the hookup orassembly of the mechanism in .such cabinet other than merely substituting a shallow tone amplifier, of the type described, at any-desired point inthe cabinet. s Another advantage o f our device relates to Y the manner of its connection to a cabinet and Athe mounting of a device such as a loud 'speaker or other form of sounding device and the connection of these'two to the amplifying section of a radio set' or' the like. The specific motive connection as herein disclosed'permits of easy.l opening and closing of the door to the interior of the cabinet,

and permits easy inspection and adjustment' of the interior mecahnism ,of the cabinet when required.

In theaccompanying kdrawings showing one of the possible embodiments 'of the invention: p

Fig. 1 is a perspective view, and

Fig. 2 is a sectional view with the top removed. showing the door in section.

Similar reference characters denote similar parts throughout the several views.

Referring to Fig. l, the cabinet comprises the usual housing for radio cabinets, the front panel F having the usual dials D thereon for operating the coupler C and the condenser G, Fig. 2. and the smaller knobs K for operating the usual rheostats, the panel'being provided with the usual bezels B aiiordin'g holes wherebvto view the tubes during theoperation of the set.`

In the lower view, Fig. 2, T represents the usualv tube sockets and L the usual transerably shown as a B-tube set, one tube being, a detector amplifier and the other two tubes being transformer coupled audio ainpliiier tubes' whereby suicient volume of amplification may be had to operate any suitable o r standard loud speaking magnetic telephone such as is indicated by M, Fig. 2, which may be any goed type of loud As shown in Fig'. I our amplifier or sound distributor comprises a comparatively shallow tone chamber, which in its preferable form comprises three elements, namely, the body portion 1 which may be of any suitable ornamental contour and arrangement as to finish. Preferably the body portion may be made rectangular as shown having a mid or cent-ral opening. Said body is of such proportions as will enable it to be used as one of the walls of the cabinet, and is here swingingly connected to an opening in the cabinet whereby to become a swinging Wall or door portion rather than a fixed wall, though it is noted that the invention is not limited to swinging walls or doors. The door ortion is shown swingingly connected there ore by means of a pair of hinges2 of any suitable type, and provided with a latch or cat-ch such as.3 whereby to latch the door shut when in use. The amplifying portion of thedevice consists of a primary annular convolxted disk of fairly large diameter genera ly denoted by- 4 which is flexibly mounted on the door portion 1 by means of a resilientstri- 5 which is affixed across the olpening of t e door portion at the rear t ereof, and on the exterior side of the strip as indicated by the full line in Fig. 1, and hy the dottedl lines in Fig. 2. On the fiexible cross strip 5 on the interior side thereof is mounted the telephone element M so that these last three'elements are flexibly connected. to and are movable with the door f portion when it is opened or closed.

As a means for modifying or damping the tone volume Without changing the setting of the radio recei-ver when once it has been set at its best point, there is provided a smaller or secondary deflector disk' generally denoted by 6 in both figures and this in turn is mounted on' the door portion 1, but independently of the other coacting tone arte off` the vdevice by means o an uprig t 7, fastened to, the front portion 1 of the door and spaced away from the` portion 1 by. the bracket 8 0r any other suitable means.

The. uplper end of the support 7 is provided wit a fork carrying a thumb screw 9 land the secondary detlector 6 is provided witha stem 10 which is adustably received 1n the fork 11 i such a. anner that the deflector 6 may wards or away from the prlma cutting dQWnt .e volume disturbmgthe quality of the therefrom. v

It-will. be noted that t e phlone element M 1s connected ille' means o flexible conductive wire or cord to on 0f the amplifying elements of th set'whi nother wire Nj ma' be e0 to' the' bdttery- (fnot shown in the usuel,

manne'and, in this ormof cone s'truction 1t described may be opened or erect` without sound. issuing is obvious 'martha amplifier outwardly tone re ector 4 therein?- tributor, includi as indicated by the dotted position denoted by O so that access may be had to the interior of the cabinet without interference with any part of the active elements thereof.

It is also obvious from the foregoing that our improvement yto cabinets of this type permits of the easy combination of this type 'amplifying device is afforded.

Having thus described our invention, it should be understood that there may be 'modifications thereof and variations therein without departing Vfrom the spirit of the invention or exceeding the scope of the appended claims. l

at we claim and desire to protect by Letters Patent is:

1. In combination, u cabinet having top, bottom, front, rear and end walls,.the front wall having a door opening therein; an apparatus in said cabinet for producing vibrations; a sound distributor includingr a body fittin in said opening to form a door and hinged,7 and provided with rear-o ning, and a sound box mounted on Asaid distributor and discharging sound into said rear o ning and provided with a diaphragm and)e vibrating means therefor' said distributor, including .sa-.id body and x, having relatively small front to rear dimensions; and freely flexible means connecting said apparatus with said vibrating means for transmitting vibration to said vibrating means when the door is closed, partly open or widely open for access to said ap' aratus, and permitting free opening and c osing movement to said door.

V'2.' In combination, a cabinet having top, bottom, front, rear and end walls, the front wall having a door opening therein; an apparatus in said cabinet for producing electric vibrations; a sound distributor includinpa bod fitting in said opening to form a oor an hinged to-one side edge of said opening and provided with rear opening, and a.A sound box mounted on said distributor and discharging sound into 'd rear openingand rovided with a didphragm and electric v1 rating means therefor; said dissaid body'andbox, hav-A i relatively sma l front to rear dimensions; an freely flexible conductors connectingv to one side edge of said opening said apparatus with said vibrating means for transmitting vibration to said vibrating means ywhen the door is closed, partly open or widely open for access to said a paratus, and permitting tree opening an closing movement to said door.

3. In combination, a cabinet having top,

bottoni, front, rear and end walls, the yfront wall having a door opening; radio apparatus insaid cabinet for producing vibrations; a. sound distributor iiicludinir a bod fittiii in said opening to form a dbox' an hinge tovoiie side edge of ksaid opening and prophone for transmitting electric vibrations to said telephone when thedoor is'closed, partly open or widely open for access to said apparatus, and permitting free opening and .closing movement to said door.

4. In combination, a. cabinet having a substantially fiat wall, an intramarginal door opening therein disposed a distance from the edges of the wall; and a sound distributor `fitting in said opening to form a door and hinged to one edge of said opening and provided with an inner opening near the mid paitof itsinner face and an annu'- lai sound distributing chamber extending from said opening through the opposite outer face of the body; said distributor being adapted to receive a soundbox mounted on sa-id distributor and discharging sound into said rear openin the main portion of said distributor inc uding said' chamber having relatively small front to rear dimensions e ual to about twice the thicknessfof said wa l and less than one sixth the diameter of the distributor.

5. In combination, a cabinet having a Wall having a door opening therein; and a sound distributor fitting in said opening to form ya door and hinged to one side edgeof said opening and provided with a sound distributing chamber includin a sound receiving openin in its inner ace and alar sound distributing opening in its* opposite face; the distance between said faces being small relatively to the diameter of the door. 6. In combination; a cabinet having a wallv having a door opening therein spaced from the edges thereof,'and a sound distributorv fitting in said o ning to form a door and hinged to one si e edge of said opening and provided with a sound receiving opening in its rear vface and a large sound outlet chainber opening through its front face; said distributor being ada ted'to carry a sound box mounted on said distributor and dischar ingV sound into said rear openin said distribultor having relatively smal front to rear dimensions.

7. In combination, a` cabinet'having a substantially fiat wall having a door opening therein spaced. from the edges thereof; an apparatus in said cabinet forproducing vibrations; a sound distributor fitting in said opening to form a door and hinged to one side edge of said opening and provided wit-li an inner receiving openingi and a large distributing chamber extending from said inner opening through the opposite outer face of the distributor, andI a sound box mounted on said distributor and discharging sound into said rear opening and provided Iwith a diaphragm and vibrating means therefor: said distributor, including Saidv body and box, having'relativelysmall front `to rear dimensions less than lilalf the diameter of the door; and freely flexible means connecting said apparatus -with said vibrating means for transmitting vibration to said v1- brating v means when the door is closed, partly open or widely open for access to said apparatus, and permitting free opening and closin movement to said door while the vibration is being transmitted.

Signed at New York in the county of New York and State of New York this 2nd day of July, A..D. 1924.

HENRY B. NEWHALL. HENRY W. PLEISTER. 

